The deafening debate on the country's expanding deficit has muffled a second, potentially deadly deficit - the crumbling of our transportation infrastructure.

So how bad is it? The American Society of Civil Engineers rates the condition of our roads a D-minus.

According to their study, Americans spend 4.2 billion hours a year stuck in traffic, with a staggering 36 percent of our nation's major roadways congested.

Poor road conditions cost motorists $67 billion a year in repairs, and 33 percent of America's major roads are in poor or mediocre condition.

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